查询词典 diffraction

The coherent electron micro-diffraction from a translation domain boundary perpendicular to the direction of the incident beam was studied. The qualitative and analytical descriptions are given to reveal the phenomena on the breakdown of center symmetry and an appearance of the forbidden diffraction spots.

对垂直电子束方向的畴界的特征，进行了实空间法的准动力学的理论推导，给出了对称性的定性描述，同时用动力学多层法程序对一些上下畴界进行了模拟；对出现的斑点不消光，中心对称的破损，镜面对称的破损等给出了定性的实空间法的动力学的理论的解析描述。

This feature gives a reasonable explanation for the mechanism of CAS. The phase velocity of diffraction fields for uniform plane wave on a circular aperture has been investigated. It is shown that diffraction can result in subluminous phase velocity at certain points of optical field in vacuum.

如果相对论电子能够注入到这一通道内，那么它与激光场间的相移就可能变得非常小，从而能够长时间地保持在加速相中得到极高能量。

Using plane wave circular aperture diffraction as an example, this researchstudied the changes ofηwith diameter of diffraction holeρ_0, propagation distance zand light spot radius r and found how to obtain the largest energy concentration degree by controlling these three factors.

本课题以平面波圆孔衍射为例，研究了光束能量集中度随衍射孔径ρ_0、传播距离z和光斑半径r的变化规律，并指出如何控制这三个因素来获得光束的最大能量集中度。

The diffraction efficiency of a gold transmission phase grating is simulated as a function of the depth of grooves and the duty cycle on the basis of the scalar diffraction theories.

根据衍射光栅的标量理论，计算并讨论了金透射光栅在软X波段衍射效率对光栅厚度和占宽比的依赖关系。

The dawsonite in oil-bearing reservoir was identified accurately with X-ray diffraction method for the first time in China,and its diffraction characteristics was given in detail.

运用X衍射手段准确鉴定了石油储层中的碳钠铝石矿物，详细解析了其衍射曲线特征，这在我国尚属首次。

The author identified the dawsonite in oil-bearing reserver well and truly with X-ray diffraction method for the first time in China,and detailedly analyzed its diffraction characteristic.

作者首次在中国运用 X 衍射手段准确鉴定了石油储层中的碳钠铝石矿物，详细解析了其衍射曲线特征。

Two kinds of stable decagonal quasicrystals and 16 approximants have been found in Al-Cr- alloys by means of selected-area electron diffraction, high resolution electron microscopy image and X-ray single crystalline diffraction.

用选区电子衍射和高分辨像等手段，确定了Al-Cr-合金系中的16个准晶近似相，其中的7个准晶近似相为新相，它们是：六方τ相，六方μ′相和正交ε相，以及周期为3.72nm的正交(2/1，2/1)，(1/1，3/2)，(2/1，3/2)相和α=2.29nm，c=3.71nm，β=108°的单斜相。

Microstrucfure of the powder samples achieved such as crystallographic structure, grain size, particle morphology, element analysis and thermal decomposition were characterized by means of X-ray diffraction, transmission electron microscopy, electron diffraction, energy dispersion X-ray spectroscopy and differential thermal analyzer etc.

结果表明，所制备的钠米镍粉、镍铜及镍铜硼复合粉呈颗粒均匀的球形或类球形，粒径在40nm～60nm之间。采用DTA方法对添加了纳米粉的高氯酸铵、AP／HTPB推进剂热分解情况进行表征。

From the x-ray diffraction analysis, the diffraction angle decreases with increasing an amount of carbon atoms.

在x-ray绕射方面我们发现，x光绕射角随著碳数增加而减少，配合对各个分子做分子长度运算，可以得到分子倾斜角。

The diffraction intensity change with to step number L , incidence wavelength λ,diffraction angle θ and outline angle φ 0 is analyzed.

分析计算了衍射光强随台阶数、入射波长、衍射角和轮廓角的变化关系。

Through comparing with the results by simulation to study the effects of theprojectile"s final velocity, the angle of rotation and the ballistic trajectory"s migration withdifferent projectile"s rotating speeds, different target"s moving speeds and differentpenetration angles.

通过比较数值模拟的结果来研究不同弹头转速、目标速度、侵彻角对侵彻过程中弹头最终速度、翻转角度和弹道偏移的影响。

I love stationery and all the accoutrement of writing.

我爱文具以及所有的书写的工具装备。